Albertine Agnes of Nassau (9 April 1634 – 26 May 1696), was the regent of Friesland, Groningen and Drenthe during the minority of her son Henry Casimir II, Count of Nassau-Dietz, between 1664 and 1679.

[1] She was the sixth child and fifth daughter of stadtholder Frederick Henry, Prince of Orange and Amalia of Solms-Braunfels.

After the death of her husband in 1664, she became regent for her son in Friesland, Groningen and Drenthe.

When Groningen was under siege, Albertine Agnes hastened to the city to give moral support.

Pressure by King Louis XIV of France, then an ally, forced the forces of her enemies retreated, but six years later the Netherlands were attacked from the south, by the French under Louis XIV and from the north by the bishop of Münster and archbishop of Cologne.